Out of 37,465 questions people around the world sent to Mr. Murakami on the special site that was open for 3 and half months, he had read ALL of the questions sent, answered 3,716 of them, and there are 473 selected questions and answers in the book edition (and all 3,716 in e-book edition which I did not read).
I was not expecting much other than just a fun pastime, but I was pleasantly surprised how I got into it and how much I enjoyed it.
His answers are often not the typical advise column answers, but also can get very philosophical and makes us think. By reading 473 of the answers, readers can get pretty good sense of who Haruki Murakami is, both as a writer, and as a human being (and my impression is: more positive than ever!).
Living outside of Japan for more than 15 years, I got a glimpse of the common issues Japanese people face now a days, in politics, school system, work, and attitude toward life, which were interesting to learn on their own.
However, considering there are many books of his that haven't been translated into foreign languages yet, mainly essays and some collections of short stories, I kind of doubt this book would be translated into English any time soon.
Foreign readers, don't be discouraged. There are many more books by him waiting to be translated into your languages.